I need help repairing a ceiling in the basement of an old church. Construction is plaster over wire lath. in some areas, there are long cracks (3-4 feet) that go all way to the wire lath. In these areas the plaster has separated from the lath and I can see movement when I push up. I'm familiar with using plaster washers when the lath is wood, but what's the method when the lath is wire? I really don't want to take down the entire ceiling, so I'm looking for a way to re-attach loose plaster to the wire underneath where possible. Some of the plaster is in pretty bad shape (likely water damage) and will have to be removed. I plan on using setting compound for the base coat. Any suggestions on bonding agents to tie the new stuff to the old? Thanks in advance.
PS. This was originally posted in General Discussions.